Resistor



April 1951 L. STOFFEL 2,547,506

RESISTOR Filed March 1, 1949 /3 w i l /4 1 m INVENTOR. Lure/e L.JTo/ffl.

60], 71M Jiflam Patented Apr. 3, 1951 RESISTOR Lester L. Stoifel,Lakewood, Ohio, assignor to The Ohio Carbon Company, Cleveland, Ohio, acorporation of Ohio Application March 1, 1949, Serial No. 78,959

1 Claim. 1

This invention relates to a resistor suitable for mounting in the baseof an electric lamp or other confined space. This resistor comprises abody of high resistant material and two conductors having their endsembedded in spaced regions of the body and leading from the same face ofthe body in substantially parallel relationship and spaced inwardly ofthe external contour of the body. By this means I provide a resistorsuitable for mounting in a space not materially larger than the externalcontour of the resistor itself as the conductors do not overhang theexternal boundary of the resistor body.

My resistor is of endless or annular form, either curvilinear orpolygonal, and has fiat transverse faces, and the two conductors havetheir ends embedded in opposite regions of the endless body each in amid-region between the inner and outer perimeter of such body. Suchformation is illustrated in the drawings hereof and is hereinafter morefully explained.

In the drawing, Fig. 1 is a vertical section through one form of myresistor, the section being on a substantially diametric plane of acircular annular unit; Fig. 2 is a perspective of the resistor shown inFig. 1; Fig. 3 is a perspective of a resistor where the resisting unitis of polygonal annular form.

In the form shown in Figs. 1 and 2, I provide a circularly annular bodyID of carbonaceous material having parallel flat faces H and I2 andparallel cylindrical inner and outer edges [3 and M respectively. Thetwo metallic conductors 2| and 22 lead in parallelism from one fiatface, as the face I I, of the resistance body. The two conductors extendwell into the body and are bent laterally therein in a more or lesszigzag form, as shown at I 5, Fig. 1. This zigzag embedded portionfirmly interlocks the conductor to the resisting body. At the same timeit enables the conductor to pass immediately from the flat face of theunit well within the external boundary thereof.

In Fig. 3, I have shown the same two conductors 2i and 22 embedded inthe same manner in the resisting body IE, but the resistor body in thiscase is polygonally annular or endless as shown. However, this form,like the circular form of Figs. 1 and 2 has parallel flat top and bottomfaces and also parallel inner and outer perimeters.

It will be seen that with either form of-resisting body, the entirestructure may be mounted in a cavity having available internaldimensions not materially longer than the exterior of the resistoritself, leaving the two conductors entirely free from the wall of thecavity and in a position for convenient attachment to any conductivemembers.

I claim:

A resistor comprising a body of carbonaceous material and of circularannular formation with parallel top and bottom faces, and a pair ofmetallic conductors substantially parallel with each other leading fromdiametrically opposite regions of the same face of the annulus, eachconductor entering the annular body at substantially the mid-region of aradial section thereof and extending Well into the body and beingdiverted laterally within the body to be firmly embedded therein therebyinterlocking said conductors with said resistor body.

LESTER L. STOFFEL.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,913,272 Graf June 6, 19332,189,515 Fessler et al. Feb. 6, 1940 2,305,977 Megow et al Dec. 22,1942 2,324,961 Stoffel July 20, 1943 2,361,405 Kopple Oct. 31, 1944

